Ablation of left atrial tachycardia with cycle length alternans after atrial fibrillation ablation: significance of fractionated electrogram mapping.
J Electrocardiol
; 44(2): 164-70, 2011.
Article
em En
| MEDLINE
| ID: mdl-21168148
ABSTRACT
INTRODUCTION:
Atrial tachycardia (AT) with cycle length alternans occurring after atrial fibrillation ablation has not been previously described.METHODS:
Among 66 patients with left AT, stable AT with 2 alternating cycles was registered in 5 cases. Activation mapping of both alternating cycles was performed in all 5 patients. Entrainment and fractionated electrogram mappings were also carried out.RESULTS:
Among 10 AT cycles, activation maps suggested underlying mechanism of 5 cycles (50%) in 3 patients. Entrainment pacing was helpful in 2 patients (confirmed mechanism of 2 AT cycles). Catheter ablation successfully terminated AT in all 5 patients ablation of sites with fractionated potentials in 4 patients and mitral isthmus ablation in 1 patient.CONCLUSION:
Consecutive activation mapping of both AT cycles is feasible for mechanism determination in some patients. The results of our small study suggest that fractionated electrogram-guided ablation might be a reasonable approach for termination of this type of AT.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Fibrilação Atrial
/
Taquicardia Atrial Ectópica
/
Ablação por Cateter
/
Mapeamento Potencial de Superfície Corporal
/
Cirurgia Assistida por Computador
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article